CN103596282A - Wireless communication system, wireless communication method and base station - Google Patents
Wireless communication system, wireless communication method and base station Download PDFInfo
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Abstract
The invention relates to a wireless communication system, a wireless communication method and a base station. In the wireless communication system, terminals measure the wireless line quality of each frequency band, and inform the base station of the wireless line quality of each frequency band. The base station determines the frequency bands used by the terminals according to the notification from the terminals. The terminals are grouped according to the different frequency bands used by the terminals, and the terminals are informed of the groups which the terminals belong to. The adopted frequency bands and the terminal groups of the terminals are set according to the notification from the base station, and the wireless line quality of the adopted frequency bands in the notification is measured. The base station is informed of a measurement result. Dispatching is carried out by the base station according to the wireless line quality of the frequency bands used by related terminals and each adopted frequency band, and the base station starts to be in communication with the terminals.
Description
The application is that application number is 200680056155.0 application for a patent for invention (international application no: PCT/JP2006/321879, the applying date: on November 01st, 2006, denomination of invention: dividing an application wireless communication system).
Technical field
The present invention relates to a kind of wireless communication system.
Background technology
Using scheduler to implement to send in the mobile communication system of distributing, some starts to obtain practical application according to 3GPP, to carry out standardized HSDPA system.
Below, for implementing the HSDPA system of descending fast transport, be example, use terminal structure example and architecture of base station example to describe.
Fig. 1～Fig. 5 is the figure that HSDPA system is in the past described.
In the terminal of Fig. 1, for example take the pilot signal of the downstream signal that receives by antenna 10, radio section 11, demodulate/decode portion 12 as basis, in radiolink quality determination/calculating part 13, measure and calculate radiolink quality index (later referred to as CQI:Channel Quality Indicator).As a specific example, by measuring received power and the interference power of pilot signal, calculate SIR, and calculate CQI based on this.This CQI value is embedded in the signal that sends use via radiolink quality index sending part 14, and is encoded and modulated by coded/modulated portion 15, then by antenna 10, via up-link wireless circuit, is transferred to base station.That is, CQI value reporting to base station.
On the other hand, inside of base station at Fig. 2, the signal of CQI value that received the embedding that sends over from terminal by antenna 20, radio section 21, demodulate/decode portion 22 is collected radiolink quality index (CQI), and is notified to scheduler 24 in radiolink quality index collection unit 23.In scheduler 24, for example use the radiolink quality index (later referred to as CQI:Channel Quality Indicator) of being reported by terminal, according to the priority of each service band computing terminal, from the high person of priority, select to send parameter, and generate by control signal generating unit 25 control signal that sends use, then by coded/modulated portion 27, radio section 28, antenna 20, send to terminal.The transmission data that send data buffer 26 send to terminal after transmitting control signal.
Fig. 3 is the handling process of scheduling.
In the community of hypothesis base station, there is terminal UE 1～UEn now.In step S10, the CQI value (CQI1～CQIn) of receiving terminal UE1～UEn.In step S11, store CQI1～CQIn.In step S12 by TTI initialization.TTI is the abbreviation of transmission time interval, represents that data are to the transmission interval of terminal.At this, be used as representing the variable to the transmission times of terminal.In step S13, TTI is increased to 1.In step S14, calculate the relative importance value Pk of terminal UE k.In step S15, be initialized as i=0, j=1.In step S16, calculate the residue Ri of Radio Resource.When i=0, owing to also there is no distributing radio resource, so Ri is whole Radio Resources of system.Whether the residue Ri that judges Radio Resource in step S17 is not less than 0.When being judged to be of step S17 is, proceed to step S21.When being judged to be of step S17 is no, in step S18, calculating relative importance value (priority) Pk in n-i terminal is the terminal UE j of maximum Pk_max.In step S19, select data to the sending method (data length, modulation system etc.) of terminal UE j.In step S20, i is increased to 1, j is increased to 1, return to step S16.In step S21, using the sending method of selecting as control signal, after modulation, send to terminal in step S19.In step S22, towards the terminal modulation that has sent control signal, send Data Concurrent and send, return to step S13.
In addition, as the computational methods of priority, adopt the MAX CIR method select from the high person of CQI value, from the high person of CQI, select and be selected to make equal-opportunity PF(Proportional Fairness) method etc.
, in above-mentioned 3GPP, about next generation mobile communication system, carried out E3G(Evolved3G) research on standard of system.Wherein, about polynary connected mode, studied for descending importing OFDMA mode, for up importing SC-FDMA mode.
And, in E3G system, use the ratio wider frequency band (for example 4 times) of HSDPA in the past, implement in the same manner scheduling with HSDPA system.The frequency bandwidth of the terminal of using in E3G system in addition, is different in uplink and downlink.In addition, for example, when descending, the spendable frequency band of terminal, because terminal is different, has 1.25MHz, 2.5MHz, 5MHz, 10MHz, 20MHz etc.
Therefore, can not as HSDPA, be defined as the scheduling of special frequency band, need to consider service band width, with band system band 20MHz, implement scheduling.
In other words, as shown in Figure 4, need to utilize a scheduler to carry out the scheduling of entire system.
And the frequency bandwidth of supposing downlink system is 20MHz, the situation that the downstream bands width of terminal is 5MHz.Now, the frequency of using when application is according to the compatibility with other-end, and frequency of utilization is variable, is likely 4.Therefore,, in order to make the scheduler of base station can consider that the service band width of other-end selects best frequency band from a plurality of frequency bands, as shown in Figure 5, must in terminal, measure and calculate every 5MHz frequency band CQI, and CQI is reported to base station.
That is, compare with HSDPA, need mensuration and the calculating of the CQI of 4 times.And, to the CQI report number of times of base station, be also 4 times.As a result, the interference of uplink is also 4 times.
In E3G system, when utilizing the scheduling of a scheduler implementation system integral body,
Merely compare with the scheduler of HSDPA system in the past, the terminal quantity of scheduler object is merely compared with HSDPA system and is reached several times (for example 4 times).
Sending that interval compares with the 2msec of HSDPA system is in the past that it 1/4 is 0.5msec.
Based on above 2 points, for example, require the schedule speed of 16 times in the past.In other words, priority must be made as to 1/16 computing time.
On the other hand, raising about the handling property of the CPU that dispatched in the past or DSP, it 2010 is that benchmark is considered that the service of E3G of take starts target, even if consider Moore's Law (Moore's Law, within 18 months, processing speed becomes 2 times), also only have 4 times of left and right, do not reach above-mentioned 16 times far away.
Therefore, the rapid of dispatch deal is indispensable.
Patent documentation 1: TOHKEMY 2006-060814 communique
Patent documentation 2: TOHKEMY 2005-318434 communique
Patent documentation 3: TOHKEMY 2001-036950 communique
Patent documentation 4: TOHKEMY 2003-259437 communique
Patent documentation 5: TOHKEMY 2005-260992 communique
Patent documentation 6: TOHKEMY 2005-160079 communique
Summary of the invention
Problem of the present invention is to provide a kind of wireless communication system, can make the processing speed of dispatch deal of base station rapid.
Wireless communication system of the present invention is the wireless communication system that a plurality of terminal communications of a plurality of frequency bands and subordinate are used in base station, it is characterized in that, described wireless communication system has: marshalling unit, the radiolink quality that its each frequency band using when according to terminal and base station communication obtains, by the plurality of terminal distribution in the group of this each frequency band; Scheduling unit, the terminal that is divided into this group is dispatched by Qi Yizuwei unit; And communication unit, it communicates base station and terminal according to the result of this scheduling.
Accompanying drawing explanation
Fig. 1 be figure that HSDPA system is in the past described (one of).
Fig. 2 is figure that HSDPA system is in the past described (two).
Fig. 3 is figure that HSDPA system is in the past described (three).
Fig. 4 is figure that HSDPA system is in the past described (four).
Fig. 5 is figure that HSDPA system is in the past described (five).
Fig. 6 means the sequence chart of the handling process of embodiments of the present invention.
Fig. 7 is the key diagram of organizing into groups by the line quality of the simplest each frequency band when circuit is set according to the present invention.
Fig. 8 means the figure of mensuration form of the radiolink quality of each service band.
Fig. 9 be the explanation marshalling of relevant terminal and the method for scheduling figure (one of).
Figure 10 is the figure (two) of the explanation marshalling of relevant terminal and the method for scheduling.
Figure 11 means the figure of the form of the service band width of terminal and the method for the asynchronous marshalling of Figure 10 and scheduling.
Figure 12 be explanation classification marshalling figure (one of).
Figure 13 is the figure (two) of explanation classification marshalling.
Figure 14 is the example of the organization chart that base station has when terminal is organized into groups.
Figure 15 is the figure of the additive method of explanation marshalling.
Figure 16 is the example of organization chart marshalling, that base station has of corresponding Figure 15.
Figure 17 mean the processing example in group time by each terminal distribution figure (one of).
Figure 18 means the figure (two) of the processing example in group time by each terminal distribution.
Figure 19 means the figure (three) of the processing example in group time by each terminal distribution.
Figure 20 means the figure (four) of the processing example in group time by each terminal distribution.
Figure 21 means the figure (five) of the processing example in group time by each terminal distribution.
Figure 22 means the figure of the theory structure of terminal of the present invention.
Figure 23 means the figure of the theory structure of base station of the present invention.
Figure 24 is the topology example when the structure of Figure 22 is applicable to measure CQI as radiolink quality.
Figure 25 is the topology example when the structure of Figure 23 is applicable to measure CQI as radiolink quality.
Figure 26 is the 2nd topology example of the base station of embodiments of the present invention.
Figure 27 means the figure of the 3rd topology example of the base station of embodiments of the present invention.
Figure 28 means the figure of the 2nd topology example of terminals corresponding Figure 27, embodiments of the present invention.
Figure 29 means the figure of the 4th topology example of the base station of embodiments of the present invention.
Figure 30 means the figure of the 5th topology example of the base station of embodiments of the present invention.
Embodiment
Below, with the descending example that is transmitted as, describe.
Fig. 6 means the sequence chart of the handling process of embodiments of the present invention.
In Fig. 6, terminal is measured the radiolink quality (1) of each frequency band.That is, according to each frequency band, according to receiving data, calculate SIR, and obtain based on this CQI value.The radiolink quality being measured to is notified to base station (2).The frequency band (3) that terminal should be used is determined according to the information of the radiolink quality receiving in base station, and whole terminals of sending radiolink quality are categorized into group (4).After the setting of marshalling finishes, the set of terminal (5) under this terminal of each terminal is notified in base station.The terminal that receives set of terminal notice is carried out the setting (6) of service band and set of terminal.At the service band that this terminal is set, measure radiolink quality (7), this measurement result is notified to base station (8)., according to notified radiolink quality, dispatch according to each service band base station.That is, the terminal that will send according to the priority selection of terminal, and select sending method.Take this result as the basic control information (9) that generates terminal reception use.Transmission control information notifying, to terminal (10), is then sent to data (11).
Like this, in OFDMA system or MC-CDMA system, according to the operable frequency bandwidth of terminal and frequency of utilization, terminal is organized into groups.Marshalling can be implemented when radiolink is set, and also can after radiolink is set, with some cycles, organize into groups.And the information of marshalling use, except the operable frequency bandwidth of terminal, it is also conceivable that the line quality of each frequency band, the circuit behaviour in service (load) of each frequency band etc.
Fig. 7 is the key diagram of organizing into groups by the line quality of the simplest each frequency band when circuit is set according to the present invention.
Specifically, suppose that the operable maximum band width of certain terminal is 5MHz, the frequency bandwidth of system is 20MHz.When circuit is set, terminal is measured radiolink quality to each frequency band after band system band 20MHz is cut apart with operable maximum band width 5MHz, calculates radiolink quality index (1), and notice is to base station (2).Frequency of utilization (3) is determined according to this information and the operable frequency bandwidth of terminal in base station (or wireless line control station), according to each service band width and frequency of utilization, divides terminal and implements marshalling (4).Line load between the frequency that in addition, also can consider to accommodate is determined frequency of utilization.
Fig. 7 and Fig. 6 are roughly the same, when setting, circuit carries out the setting of service band and set of terminal, under normal condition, each terminal is measured the radiolink quality of the service band of this terminal, and base station is dispatched according to the radiolink quality of being reported and started and communicates by letter.The action of normal condition is identical with Fig. 6, so description thereof is omitted.
Fig. 8 means the figure of mensuration form of the radiolink quality of each service band.
As previously described, determined that the terminal of set of terminal is only measured line quality and calculates CQI the frequency of utilization of being determined, and reported to base station.
Thus, CQI report number of times is cut down, and can reduce uplink interference.
Classifying CQI according to each group of this terminal in the base station that receives CQI, according to each set of terminal (each service band), dispatches.Thus, the terminal of scheduler object reduces, and the relative importance value computational throughput of terminal during scheduling is cut down, and can make to process rapid.And, according to each set of terminal, dispatch, by making a plurality of scheduler concurrent activities, can make to process more rapid.
Fig. 9 is the figure of the explanation marshalling of relevant terminal and the method for scheduling with Figure 10.
In Fig. 9 and Figure 10, the frequency band that represents system is the situation that the service band width of 20MHz, terminal is 5MHz, and terminal UE 100～UE139 is organized as to 4 groups.The 1st group of service band 1, is used the scheduler 1 in the scheduler that is provided with 4 to dispatch.Equally, the 2nd group has been assigned with 2, the 3 groups of frequency band 2 and schedulers and has been assigned with 3, the 4 groups of frequency band 3 and schedulers and has been assigned with frequency band 4 and scheduler 4.Figure 10 (a) represents this form.Because the transmission interval of data is 0.5ms, so the scheduling of each group is carried out once every 0.5ms.
Like this, when receiving a plurality of scheduler, each set of terminal is distributed to 1 scheduler.That is, for example by scheduler 1, dispatched for the 1st group, by scheduler 2, dispatched for the 2nd group.These scheduling can be according to implementing side by side shown in Figure 10 (b).
Figure 11 means the figure of the form of the service band width of terminal and the method for the asynchronous marshalling of Figure 10 and scheduling.
The situation that the service band width that represents terminal in Figure 11 is 10MHz, be organized into service band 1 and frequency band 2, by scheduler 5, dispatched the 5th group and service band 3 and frequency band 4, by scheduler 6, dispatched the 6th group.
Figure 12 and Figure 13 are the figure of explanation classification marshalling.
As mentioned above, the operable frequency bandwidth of terminal is because of the performance difference of terminal.Therefore, can consider according to the method for can service band width organizing into groups.Figure 12 represents to use terminal UE 160～UE169 of 20MHz to be classified as the 7th group, and uses whole frequency bands 1～4 to be dispatched by scheduler 7.On the other hand, terminal UE 140～UE149 that service band is 10MHz and UE150～UE159 are classified as respectively service band 1,2, by scheduler 5, dispatched the 5th group, and service band 3,4, by scheduler 6, dispatched the 6th group.Service band is that terminal UE 100～UE109, UE110～UE119, UE120～UE129, the UE130～UE139 of 5MHz is classified as respectively service band 1, by scheduler 1, dispatched the 1st group, service band 2, by scheduler 2, dispatched the 2nd group, service band 3, by scheduler 3, dispatched the 3rd group, and service band 4, by scheduler 4, dispatched the 4th group.
As Figure 13 (a) with (b), take that to use can service band be all prerequisite, to be for example 20MHz can the wide group of service band be made as upper hyte can service band, and to be for example 5MHz can the narrow group of service band be made as lower hyte can service band.Now, scheduling is to implement according to the order from upper hyte to lower hyte.
As shown in Figure 13 (a), in the transmission time of each data, be each 0.5ms, first the 7th group is scheduled, and is then the 5th group and the 6th group and is scheduled, and is finally 1st～4 groups and is scheduled.Figure 13 (b) has described the form of the scheduling after being graded.From scheduler 7, start to dispatch successively step by step.Scheduler 5 and 6 these two scheduler concurrent activities, scheduler 1～4 these 4 scheduler concurrent activities, so can the phase to be scheduled rapid.
Figure 14 is the example of the organization chart that base station has when terminal is organized into groups.
Corresponding each set of terminal sequence number, registers centre frequency, the frequency bandwidth of the service band of each group and the identification serial number that belongs to the terminal of each group.
Figure 15 is the figure of the additive method of explanation marshalling.
The data difference of necessary transmission speed because transmitting.Therefore, necessary bandwidth degree factor data and difference.That is, also can consider need to expand the situation of service band width and the situation that can dwindle service band width according to QoS.In addition, although in the situation that do not meet necessary transmission speed and can transmit by dwindling frequency bandwidth according to the compatibility with other-end, also can consider to implement transmission.Therefore, when the operable frequency bandwidth of certain terminal is 20MHz, not only belong to the set of terminal that service band width is 20MHz, also can belong to the set of terminal of the frequency bandwidth that 10MHz, 5MHz etc. are narrower.Therefore, by set of terminal according to the size order classification of its service band width.In Figure 15, the terminal that service band is 20MHz also can be communicated by letter when 10MHz, 5MHz.And the terminal that service band is 10MHz also can be communicated by letter when 5MHz.Service band is that terminal UE 160～UE169 of 20MHz is grouped into as except belonging to service band 1～4, dispatched by scheduler 7 the 7th group, also belongs to each group of 1st～6 groups.Therefore, when terminal UE 160～UE169 can not be used the frequency band of 20MHz, in the situation that the 5th group or the 6th group of 10MHz frequency band can not be used 10MHz frequency band, terminal UE 160～UE169 is assigned to any a group in 1st～4 groups of 5MHz frequency band, thereby reduces the possibility that terminal UE 160～UE169 can not communicate by letter.Equally, terminal UE 140～UE149 that service band is 10MHz, terminal UE 150～UE159 are also assigned in 1st～4 groups, when when 10MHz frequency band can not be communicated by letter, make it possible to the frequency bands for communication at 5MHz.Due to the service band not existing below 5MHz, so terminal UE 100～UE109, UE110～UE119 that service band is 5MHz, UE120～UE129, UE130～UE139 only belong to respectively 1st～4 groups.
When scheduling, for example, according to the group from upper classification (20MHz), for example, to the order of the group (5MHz) of the next classification, dispatch.Thus, the scheduler object terminal quantity in can reduction group, can cut down priority computing, can make to dispatch rapid.
Figure 16 is the example of organization chart marshalling, that base station has of corresponding Figure 15.
Respectively counterpart terminal group sequence number 1～7 be registered with the service band of each group centre frequency, frequency bandwidth, belong to the identification serial number of the terminal of each group.
The situation of Figure 14 is also identical, and when a plurality of scheduler is set, its magnitude setting is corresponding to the quantity of group.And, according to each group, scheduler is set, each scheduler is moved according to hierarchical parallel noted earlier, thereby can improve schedule speed.And, also a plurality of schedulers can be set, and use can concurrent activity a scheduler.
Figure 17～Figure 21 means the figure of the example of the handling process in group time by each terminal distribution.
In the processing example of Figure 17, in step S30, confirm that the maximum of object terminal can service band width.In step S31, from terminal, receive the CQI of each frequency band.In step S32, according to the maximum selection rule service band of CQI.In step S33, select the set of terminal corresponding to the frequency band of selecting.
In the example of Figure 18, in step S35, confirm that the maximum of object terminal can service band width, in step S36, from terminal, receive the CQI of each frequency band.In step S37, according to the behaviour in service choice for use frequency band of CQI and each frequency band, in step S38, select set of terminal.The behaviour in service of each frequency band refers to the quantity of the terminal that is assigned to each frequency band etc.When the quantity of terminal that is assigned to certain frequency band is too much, the frequency that the device that is scheduled is selected reduces, and transmission speed declines, so during this situation, implement not select the frequency band of CQI maximum and select the processing of second largest frequency band of CQI etc.
In the example of Figure 19, in step S40, confirm that the maximum of object terminal can service band width.In step S41, from the CQI of terminal frequency acceptance band width and each frequency band.In step S42, according to maximum selection rule service band width and the service band of CQI.In step S43, select set of terminal.In Figure 19, suppose that terminal can be used a plurality of service bands.For example, in the situation that the service band that band system band is 20MHz, terminal is 10MHz, as service band width, terminal can be used 10MHz and 5MHz.Therefore, terminal is measured the CQI of two frequency bands of 10MHz width and 4 frequency bands of 5MHz width, and base station is according to this measurement result choice for use frequency band.
In the example of Figure 20, for example, consider to have set the GBR(Guaranteed Bit Rate of QoS) situation.That is, consider to have set the situation of the service of stipulating minimum transmission speed.For example, suppose that frequency band is 5MHz, modulation system is QPSK, and encoding rate is 1/3, and the transmission speed that can transmit is 3Mbps.Now, when the GBR of certain terminal is 5Mbps, in order to meet GBR, frequency bandwidth need to be made as to 10MHz.Therefore in the group that is, 10MHz by terminal distribution to service band width.About modulation system, except QPSK, also have the many-valued modulation systems such as 16QAM, 64QAM, also can make encoding rate change, or use MIMO function.
In step S45, confirm that the maximum of object terminal can service band width.In step S46, confirm that transmission data are to the QoS of object terminal transmission.In step S47, calculate necessary bandwidth degree.In step S48, from terminal, receive the CQI of each frequency band of necessary bandwidth degree.In step S49, according to the maximum of CQI and can service band width and necessary bandwidth degree carry out choice for use frequency bandwidth, in step S50, select set of terminal.
In the example of Figure 21, consider the situation that transmission characteristic worsens because of the movement of terminal.That is, according to the translational speed of terminal, determine Doppler frequency, according to Doppler frequency, judge the deterioration degree of this transmission characteristic.More high-doppler frequency is larger for frequency of utilization, so in order to tackle fast moving, use lower frequency during preferably with terminal communication.
Therefore, for example band system band width is 20MHz, when centre frequency is made as to the f1<f2<f3<f4 in Figure 14, the higher frequency band of frequency (centre frequency f3, f4, f6) is made as towards fast moving terminal, lower frequency band (f1, f2, f5) be made as towards low speed move or static in terminal.
Before terminal marshalling, the translational speed of terminal is inferred in terminal or base station.As estimation method, for example, measure the interval (decline spacing) of the received electric field strength decline forming because of decline, thereby infer translational speed.By the threshold value comparison of its result and translational speed, when very fast, be judged to be fast moving, when slower, be judged to be during low speed moves or stop.
In step S55, carrying out the translational speed of object terminal infers.In step S56, judge that fast moving/low speed moves.In step S57, the maximum of confirming object terminal can service band width, in step S58, from terminal, receive the CQI of each frequency band of necessary bandwidth degree, in step S59, according to translational speed and can service band width and the CQI of each frequency band select frequency bandwidth and service band, in step S60, select set of terminal.
Figure 22 means the figure of the theory structure of terminal of the present invention.Figure 23 means the figure of the theory structure of base station of the present invention.In Figure 22, to the structure corresponding with Fig. 1 mark identical with reference to label.In Figure 23, to the structure corresponding with Fig. 2 mark identical with reference to label.
At the OFDMA of E3G etc. or MC-CDMA etc., use in the descending transmission of wireless communication system of a plurality of frequency bands, certain terminal receives downgoing control signal (for example pilot tone) by antenna 10, radio section 11, demodulate/decode portion 12 when circuit is set, and measure received power, thereby by line quality determination part 13, measure and calculate the radiolink quality of each frequency band, use uplink wireless channel that its result is notified to base station by line quality sending part 14, coded/modulated portion 15, radio section 16, antenna 10.
In the base station of radiolink quality that receives each frequency band, circuit is set the radiolink quality of each frequency band determining by measurement result extraction unit 29 extraction terminals etc., and offers circuit configuration part 30.Circuit configuration part 30 is with reference to the information of the relevant terminal of set of terminal configuration part 31, and consider this terminal can service band width and behaviour in service and the load of frequency band, determine the frequency band that this terminal is used, according to service band, terminal is organized into groups, its result is notified to terminal by set of terminal setting signal generating unit 32.
The terminal that receives notice is extracted these information by set of terminal set information extraction unit 17, is assigned the setting of frequency band etc. of the set of terminal of this terminal by 18 pairs of radio sections of terminal setup control portion 11,16, line quality determination part 13.Then, by the line quality of line quality determination part 13 results of regular determination service bands, computational scheme quality index, and report to base station by uplink wireless channel.
By line quality information collection/division 23, receive from the base station of the radiolink quality index of each terminal and according to each group under terminal, radiolink quality index is classified, use scheduler 24-1～24-n, according to radiolink quality index, according to each batch total, calculate and send priority.Now, each scheduler 24-1～24-n selects to be responsible for to send the scheduler of the set of terminal under the terminal of line quality information, and calculates and send priority.In addition, in Figure 23, only described two schedulers, but generally can arrange n, if magnitude setting will be more effective corresponding to the quantity of set of terminal.
According to the result of calculation of priority, the terminal that selection will send is selected sending method (such as sending data volume, modulation system, encoding rate etc.), according to its result simultaneously, in control signal generating unit 25-1～25-n, generate and transmit control signal, and send to the terminal that sends data.After transmitting control signal, according to definite sending method, encoding and modulate sends data, then sends to terminal.In addition, consider terminal can service band width and can use modulation system etc. to carry out the selection of sending method.In addition, by limiting operable modulation system etc. according to each group (each scheduler), can simplify sending method and select to process.
In terminal, by control signal extraction unit 19, extract transmitting control signal of sending over from base station, separate the content of read signal, demodulate/decode portion 12 is received to the needed setting of data.After setting, receive the data that send over from base station.
As mentioned above, by according to the frequency band using, terminal being organized into groups, can realize following processing.
1) only service band is measured to radiolink quality, calculate radiolink quality index and report to base station.
2) according to each group, dispatch, calculate priority, select transmitting terminal, and definite sending method.
According to the above, there is following effect.
About untapped frequency band, can cut down the mensuration of radiolink quality.That is, processing is become simple.And, can cut down the report number of times for the radiolink quality index of base station.Thus, can alleviate the transmission processing of terminal and cut down report number of times, so can reduce the wave interference of uplink.
And, owing to dispatching according to each group, so can cut down scheduler object terminal quantity, can shorten the processing time of priority calculating etc.In addition, owing to dispatching according to each group, so can realize the concurrent activity of scheduling, can shorten the processing time of priority calculating etc.
In addition, in the architecture of base station example of Figure 23, utilizing the circuit configuration part 30 of dotted line and epigyny device that set of terminal configuration part 31 also can be arranged on base station is in wireless line control station (RNC).
In the above description, when circuit is set, carry out the marshalling of terminal, but also can be according to certain intervals change marshalling, the purposes such as quantity (i.e. load) adjustment of accommodating of terminal that can also be based in corresponding frequency band change marshalling at any time.During this situation, for example, according to the step process shown in Fig. 6.
Figure 24 is the topology example when the structure of Figure 22 is applicable to measure CQI as radiolink quality.Figure 25 is the topology example when the structure of Figure 23 is applicable to measure CQI as radiolink quality.
CQI mensuration/the calculating part of Figure 24 determines which set of terminal is this terminal belong to, and CQI is measured and calculated to the frequency band then only this set of terminal being used.Its setting is undertaken by terminal setup control portion 18.CQI collection/the division 23 of Figure 25 collects mensuration, the calculated value of the CQI that the service band of set of terminal self terminal, affiliated to this terminal is relevant, and the CQI value obtaining is forwarded to the scheduler of the scheduling of being responsible for counterpart terminal group.
Figure 26 is the 2nd topology example of the base station of embodiments of the present invention.
In Figure 26, to the structure corresponding with Figure 23 mark identical with reference to label.
In said structure example, that considers terminal can implement marshalling by service band width.At this, what for example consider terminal can service band be 20MHz, and a frequency band after divided is 5MHz.This terminal belongs to the group that service band is 20MHz.But, according to the data that will transmit, be likely the request transmission speed that does not need to use 20MHz frequency bandwidth.During this situation, service band width is made as to 20MHz by inefficent.But, cause using 20MHz in the fixing group of service band width.
Therefore, for example repeat to belong to can service band width the group that is 20MHz, group that frequency bandwidth is 10MHz and the frequency bandwidth group that is 5MHz.In addition, also can belong to and use the different group of centre frequency, so belong to 7 groups during this situation.Now, in the situation that use wide frequency bandwidth, when selecting the terminal that will send, must start order from the wide person of service band width and implement scheduling.Therefore, according to the ordinal ranking from the wide group of service band width to narrow group, thereby can easily use wide frequency band.And, when using wide service band, preferably select continuous frequency band, by according to described classification above, can easily use continuous frequency band.
During marshalling after carrying out such classification, each set of terminal is not distributed to different schedulers, and by arrange can parallel computation a hierarchical scheduler 24a realize.
Figure 27 means the figure of the 3rd topology example of the base station of embodiments of the present invention.Figure 28 means the figure of the 2nd topology example of terminals corresponding Figure 27, embodiments of the present invention.In Figure 27, to the structure corresponding with Figure 23 mark identical with reference to label.In Figure 28, to the structure corresponding with Figure 22 mark identical with reference to label.
At this, with the up example that is transmitted as, describe, but when carrying out downlink transfer, also can carry out choice for use frequency band by up-link wireless line quality.
Terminal is according to being stored in the terminal capabilities in terminal capabilities storage part 52, by terminal capabilities Information generation portion 53, generate terminal capabilities information, according to terminal capabilities, get final product service band information, to base station, send the control signal (for example pilot signal) being generated by uplink control signal generating unit 54.
Base station is determined at the received power of the control signal (for example pilot signal) sending with each frequency band from terminal when circuit is set in CQI mensuration/calculating part 50, what terminal capabilities information extraction portion 51 was extracted the result calculating the radiolink quality of each frequency bands and obtain and terminal can service band width, and provide it to circuit configuration part 30, select the affiliated group of corresponding terminal, and notice is to terminal.
Receive the terminal of notice by set of terminal set information extraction unit 17 extraction group information, terminal setup control portion 18 carries out the device of radio section 11,16 etc. and sets, to can receive by corresponding frequency band, uses this frequency band to implement transmitting uplink data later.
On the other hand, base station is the frequency band to the group under later terminal only, by CQI mensuration/calculating part 23, measures and calculate up-link wireless line quality, according to its result, implements uplink scheduling.According to the relative importance value calculating by scheduling, select terminal, select uplink sending method, then notice is given the terminal of selecting.This notice is extracted by the control signal extraction unit 19 of terminal, and demodulate/decode portion 12 is set.
Figure 29 means the figure of the 4th topology example of the base station of embodiments of the present invention.In Figure 29, to the structure corresponding with Figure 23 mark identical with reference to label.
In said structure, with the marshalling of can service band width implementing terminal of the radiolink quality of each frequency band and terminal, but also consider the QoS(Quality of Service of the data that will transmit at this) carry out the marshalling of terminal.QoS when base station and terminal communicate by advance (for example, when circuit is set) determine, QoS when base station is learnt with terminal communication in advance, so by this input information circuit configuration part 30 and set of terminal configuration part 31, the consideration object when terminal is organized into groups.
Figure 30 means the figure of the 5th topology example of the base station of embodiments of the present invention.In Figure 30, to the structure corresponding with Figure 23 mark identical with reference to label.
In said structure, with the marshalling of can service band width implementing terminal of the radiolink quality of each frequency band and terminal, but also consider that at this translational speed of terminal implements marshalling.In base station, translational speed mensuration/calculating part 40 is measured for example for example, from the control signal (pilot signal) of terminal transmission and the received power of data, according to the translational speed of measurement result computing terminal (or relative velocity of terminal and base station).In set of terminal configuration part 31 or circuit configuration part 30, the speed of the terminal of measuring and calculating and the threshold speed that is kept at set of terminal configuration part 31 or 30 inside, circuit configuration part are compared, when threshold value is above, judge that terminal is just in fast moving, carry out the selection of service band width and frequency of utilization, select the group of terminal simultaneously.In addition, threshold speed also can be kept at set of terminal configuration part 31 or 30 outsides, circuit configuration part.
As described above, according to the present invention, according to each frequency of utilization, terminal is organized into groups, according to each group, implement scheduling, can cut down thus the scheduler object terminal quantity of each scheduler, can dispatch by parallel practice, and can shorten the dispatch deal time.
And, owing to can only service band being implemented the mensuration of radiolink quality, so can cut down to measure, process.In addition, owing to can cutting down the report number of times of radiolink quality, so can cut down interference power.
Claims (15)
1. a wireless communication system, wherein, a plurality of terminal communications of a plurality of frequency bands and subordinate are used in base station, it is characterized in that, and described wireless communication system has:
Marshalling unit, the bandwidth available that this marshalling unit is used according to its performance according to terminal, by described a plurality of terminal distribution at least one frequency band group, wherein, described bandwidth available consists of more than one frequency band, and described frequency band group consists of more than one frequency band;
Scheduling unit, its Radio Resource by described frequency band group is shared at more than one terminal room simultaneously, and dispatches being assigned to the terminal of this group for frequency band group described in each; And
Communication unit, it communicates base station and terminal according to the result of this scheduling.
2. wireless communication system according to claim 1, is characterized in that, described terminal is divided into the size of frequency bandwidth of the frequency band using according to this terminal and in the group of classification, hyte starts to dispatch successively from classification.
3. wireless communication system according to claim 1 and 2, is characterized in that, terminal repeats to belong to a plurality of groups.
4. wireless communication system according to claim 1, is characterized in that, in base station, only the frequency band of the group under communication object terminal is measured to radiolink quality.
5. wireless communication system according to claim 1, is characterized in that, in terminal, only the frequency band of the group under terminal is measured to radiolink quality.
6. wireless communication system according to claim 5, is characterized in that, the radiolink quality determining by calculating obtains radiolink quality index, and sends it to base station.
7. wireless communication system according to claim 1, wherein, described terminal is according to the received power calculating radiolink quality of the control signal being sent by described base station when circuit is set, and result is sent to described base station; And
Organize into groups described terminal according to the radiolink quality receiving described base station, and notify described terminal its affiliated group.
8. wireless communication system according to claim 1, wherein, radiolink quality is calculated according to the received power of the signal being sent by described terminal when circuit is set in described base station, and according to this radiolink quality, described terminal is organized into groups, and notifies described terminal its affiliated group.
9. wireless communication system according to claim 1, is characterized in that, the quality of service information of the data that also consideration will be transmitted is organized into groups terminal.
10. wireless communication system according to claim 1, is characterized in that, also considers that the measured value of the translational speed of terminal is organized into groups terminal.
11. wireless communication systems according to claim 1, is characterized in that, according to each group, and the modulation system, the encoding rate that while setting communication, use.
12. wireless communication systems according to claim 1, is characterized in that, described scheduling unit consists of a plurality of schedulers of being responsible for the scheduling of each group.
13. wireless communication systems according to claim 1, is characterized in that, also consider the line quality of each frequency band of base station and each terminal room, by described terminal marshalling.
The wireless communications method of a plurality of terminal communications of a plurality of frequency bands and subordinate is used in 14. 1 kinds of base stations, it is characterized in that,
The bandwidth available of using according to its performance according to terminal, by the plurality of terminal distribution, in the group of each frequency band, wherein, described bandwidth available consists of more than one frequency band,
The Radio Resource of described frequency band is shared at more than one terminal room simultaneously,
For each frequency band group, to being assigned to the terminal of this group, dispatch, according to the result of this scheduling, base station and terminal communicate.
15. 1 kinds of base stations, a plurality of terminal communications that it uses a plurality of frequency bands and subordinate, is characterized in that having:
Marshalling unit, the bandwidth available that it uses according to its performance according to terminal, by the plurality of terminal distribution, in the group of each frequency band, wherein, described bandwidth available consists of more than one frequency band; And
Scheduling unit, its Radio Resource by described frequency band is shared at more than one terminal room simultaneously, and dispatches being assigned to the terminal of this group for each frequency band group.
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